Self-cleaning grid tamper for concrete



July 9- v J. -r. FEELEY ET AL r 2,474,937

SELFTCLEANING GRID TAMPER FOR CONCRETE Filed July 31 1946 I8 22 h'filf'k 922822101 Patented July 5, 1949 SELF-CLEANING GRID TAMPER FORCONCRETE John T. Feeley and Wells P. Goodenough, Palo Alto, Calif.

Application July 31, 1946, Serial No. 687,310

3 Claims.

This invention relates to improvements in concrete self -cleaning gridtampers.

An object of the invention is to provide an improved self-cleaning gridtamper for concrete for tamping and settling concrete when first putdown to pack and settle the same. Y

Another object of the invention is to provide a one man operatedself-cleaning grid tamper for concrete comprising an inverted U-shapedhandle having main parallel cross-frame members secured to its lowerends and suitably braced, and a plurality of interconnected spacedtamping rods secured between said main cross members.

A further object of the invention is to provide an improvedself-cleaning grid tamper for concrete including an offset invertedU-shaped handle having spaced tamping grid bars supported thereon bywelding or by bolts, as desired.

Another object of the invention is to provide an improved self-cleaninggrid tamper for concrete including an inverted U-shaped handle suitablyconnected by parallel extending grid rods, and adapted to detachablysupport a grid frame having attaching hook fasteners, whereby newlypoured concrete may be tamped without interfering with the materials ofthe concrete mixture.

Another object of the invention is to provide an improved self-cleaninggrid tamper for concrete which will be highly efiicient in operation,and relatively inexpensive to manufacture and produce.

Other objects will appear as the description proceeds.

In the accompanying drawings which form a part of this application,

Figure 1 is a perspective view of the improved self-cleaning grid tamperfor concrete;

Figure 2 is an end view of the improved selfcleaning grid tamper forconcrete Showing the ofi-set handle therefor;

Figure 3 is a view taken on the line 33 of Figure 2;

Figure 4 is a perspective view of the detachable grid frame for thetamper and,

Figure 5 is an enlarged detailed view of the mesh construction formingthe detachable grid frame.

Like characters of reference are used throughout the followingspecification and the accompanying drawings to designate correspondingparts.

In carrying out the invention, there is provided an improved invertedU-shaped handle having an upper centrally disposed grasping portion Iand integral depending downwardly and outwardly flared side portions 2and 3, which are bent adjacent their lower ends to form the verticalportions 4 and 5.

Relatively heavy parallel extending cross-frame members 6 and l arewelded or bolted at 8 to the lower ends of the handle portions 2 and 3and are suitably braced by the inverted U-shaped bracing arms 9 and I0welded or bolted at H to said handle portions 2 and 3, and welded at I2to the opposite inner ends of said cross-frame members 6 and I.

A plurality of spaced parallel extending selfcleaning tamping bars l3are disposed between the frame members 6 and l and are welded or boltedto their lower edges at M.

A pair of spaced bracing rods l5 are welded or bolted at It to the upperedges of said tamping bars l3 to reinforce the same.

A detachable tamping grid is provided with the longitudinally extendingparallel frame arms I! and I8 formed with the arcuate attaching hooks l9at their opposite ends for securing about the opposite cross-framemembers 6 and 1. The end frame arms 20 and 2| are welded or bolted tothe arms I! and I8 to provide a substantially rigid frame in which theheavy mesh 22 is secured in any desired manner.

In operation, the concrete when first poured will be tamped with theself-cleaning grid tamper having the tamper bars only. After theconcrete has been settled and packed, the removable grid tamper framewill be hooked over the tamper, and the concrete tamped to evenly settlethe uppermost portions thereof.

It will be understood that the improved tamper may be used for any formof concrete work, and may be made in larger sizes for two man operationfor making concrete roads and for large operation.

While the preferred embodiment of the instant invention has beenillustrated and described, it will be understood that it is not intendedto limit the scope of the invention thereto, as many minor changes indetail of construction may be resorted to without departure from thespirit of the invention.

Having thus described our invention what we claim as new and desire tosecure by Letters Patent of the United States is:

1. A self-cleaning grid tamper for concrete comprising an invertedoiT-set U-shaped handle, transversely extending spaced parallel framemembers secured thereto, inverted U-shaped bracing members secured tosaid handle and to Said parallel frame members, a plurality of spacedself-cleaning longitudinally extending tamping bars secured to the loweredges of said parallel frame members, spaced reinforcing bars securedtransversely to the upper surfaces of said tamping bars, and a gridframe having hooked attaching arms at its corners for removablysupporting the same on saidtamper -be1ow:safl d;tampingiba.1fs.

2. A self-cleaning 'g-r id tamper for concrete comprising a plurality ofspaced self-cleaning longitudinally extending tamping bars,meanssecuring said bars in spaced relation s gri-dsframe I having hookedattaching arms at its corners tor removably supporting the same on saidtamper below said tamping bars, and a handle secured,

to said tamping bars.

3. A self-cleaning grid tamper for concrete comprising an invertedU-shaped handle-"spaced"- parallel frame members secured thereto, a plu-20 2,333,855

REFERENCES CITED 'The following referemces are of record in the file of,vthispatent:

UNITED STATES PATENTS Number .Name Date 1,659,,024 Hamilton Feb. 14,1928 2,291,891 Glymph Aug. 4, 1942 Gascoigne Nov. 9, 1943

